Antioffset mechanism for printing presses



R. J. GREENWAY OFFSET MCHANISM FOR PRINTING PRESSES l Aug. 9, 1927.

ANTI- Filed March 5. V1925 25 'lNvl-:NTORA W ATTORNEYS y UNITED STATES PATENT vonirica'.

RICHARD J'. Y &` s ONS COMPANY, ,STONINIGEN,

A. COB-PORAHON 0F DELA- nn'rforrsm nnciumsm Foa rnnrrnw remesas.4

Application mea umn s, 1921s.` serial no. 12,843'.-

'II-he object of my invention is to provide certain improvements in the construction,

fountain and a fountain form and arrangement of the several elef'ments of the anti-offset mechanism whereby .the lanti-offset powder.' may be efficiently and thoroughlyj applied Vwithout waste,f to the freshly printed side .of the sheet or web; said elements including a travellng' endless beltl arranged .for contact (preferably extended contact) with the sheet or web while on its carrier, 'an anti-offset ro arrange directly to the belt for a vlv the owder Pp P freshly printed transfer thereby onto the side of the sheet or web.

A practical' embodiment of invention is represented 'in the. accompanying drawin 1 represents in 1 The endless 7 and 8 are so arranged endless belt to have an extended contact.

in which f Vside elevatlon so much of aprintingpress asincludes my improved Fig. 2 represents a The rotary carrier isaherein shown as a sheet carrying cylinder 2 ,fthe shaft-3 of which cylinmounted inthe frame 4. belt 5 passes around the drive roll 6, the idler rolls? and 8 andthe.l belt der is sultabl itightener roll 9.A These rolls are all suitably mounted' in 'the frame 4 and the rolls with the freshly printed Iside of the sheet on thecarrier.` A

The anti-ofsettpowder supply' fountain .1s denoted by an its roll 11 is arranged -1 n positionto apply the antifoifset pow er d1-v rectly *to the; endless belt 5 for transfer thereby onto-the freshly printed side of the sheet.` L Y An adjustabledoctor knife L!l is mounted in the fountain amount of anti-offset. vpowder applied by the fountain rollto theendless belt.

Thecarrier, the endless belt and the foune n V.tain roll are driven atfthe same-surface vspeed-from ythe carrier gear 13' through the 21A and gear 14, shaft 15, bevel gears' 116 and 17, shaft It will be seen that by this 'arrangement i I. am enabled to apply the anti-offset powder to the freshly'printed side of the sheet plowder supply' Y What I claim is:

Iwhile on the carrier,-

vertical .section 1 provided with' so'as to cause the i 10 in position to regulate thek bevel gears 19 and 20 and gears or web in regulable'quantities that all ennnnwajor waaraan?, :mona ISLAND, assrenon 'ro c.- B. coT'rnELL coNNEcrrcU'r,

waste of the powder may beeliminated and also so. that too much powder need not be applied to the freshly printed side of the s eet or web.

It is evident that various-changes may be resorted to in the construction, form and f arrangement of the .several parts without departing from the s' invention; hence, I o .not intend to limit myself to the particular embodiment herein shown and described, but

'1. -A rotary carrier for aifreshly printed sheet or web, a traveling endless belt arranged for contact with the sheet or. web anv anti-offset powder supply fountain, and a fountain roll to apply the powder directly to the belt. for transfer thereby onto the freshly printed` outer side of the sheet or web.

2. A rgtary carrier for a freshly printed sheet or web, a .traveling endless belty arranged for extended contact with .the sheet or web while -on the carrier, an anti-offset powder su `ply fountain, and a fountain 'roll trans er thereby lonto the freshly'printed outer side of the sheet or web.

3. 'A rotary carrier for afreshly prin-ted` sheet or web, a traveling endless belt, ar-

ranged for contact with the sheet or web while on the carrier, an anti-offset powder suppl folntain, and a fountain roll to apt e powder' directl transfer thereby onto te freshly printed outer side of thesheet or web the carrier,-

beltand roll being. driven att esame surface speed 4. rotary carrier for a freshly printed sheet orweb, .a traveling endless belt aror web while on the carrier, an anti-offset powder supply fountain, and a fountain roll .RiCHARDa GiiEnNwAY.

e powder directly to the belt for( to, the belt for ranged for extendedcontact with the sheet irit and scope of my 

